On Sunday, December 15th travis-ci.org will be down for planned maintenance for about 2 hours starting at 1pm UTC and ending by 3pm UTC. We will be performing some necessary database maintenance on the platform.
During this time, your builds triggered via GitHub will still be accepted, but all public services (including api.travis-ci.org) cannot be reached. Any scheduled or running builds will be canceled and re-enqueued to begin running after the maintenance window has concluded.
For more details, see the blog post: https://blog.travis-ci.com/2019-12-10-database-maintenance-travis-ci-org